Search PubMed⌕ Search

Biomedical subjects

S Koh

Publications and source records attributed to S Koh.

At least 91 records · Page 5Linked to original sources
PubMed1983

An improved method for transseptal left ventricular catheterization.

It is difficult to perform a retrograde left ventricular catheterization in patients having an aortic valve replacement. An improvement of the conventional transseptal catheterization (Brockenbrough method) led to a better success rate of catheterization. The fulcrum of the improved catheter was located 7 cm from the tip. Its curvature was approximately 270 degrees. Its tip was bent inward to form a pig-tail shape to prevent myocardial injury. This catheterization was performed 33 times in 32 patients. A 97% success rate was achieved. An exercise loading test was performed with a bicycle ergometer while this catheter was maintained in the left ventricle of a patient placed in a supine position. The catheter was well retained in the left ventricle and produced a minimal number of arrhythmias during exercise. The modification of this catheter has proved to be a better method of left ventricular catheterization in patients with an aortic valve replacement.

Adult↗
PubMed1983

Maternal death associated with hydatidiform molar pregnancy.

Three maternal deaths with hydatidiform molar pregnancies associated with severe hemorrhage and coagulopathy are described. Symptoms of coagulation abnormalities are few in mild degrees of intravascular coagulation. This paper addresses the importance of anticipating a coagulopathy in hydatidiform molar pregnancy even before evacuation of the abnormal conceptus since evacuation aggravates fibrinolytic activity and therefore increases hemorrhage in these conditions.

Adult↗
PubMed1983

Prognostic significance of the new placental proteins in trophoblastic disease.

Circulating levels of four specific placental proteins, human chorionic gonadotrophin (hCG), Schwangerschafts protein 1 (SP1), placental protein 5 (PP5) and pregnancy-associated plasma protein A (PAPP-A), were measured in 31 patients with hydatidiform mole before treatment. Seven patients subsequently developed clinical choriocarcinoma and three of them had pulmonary metastases. The estimations of hCG, PP5 and PAPP-A levels were found to be of no value in the prediction of malignant sequelae. Levels of SP1 greater than or equal to 16.5 i.u./l were associated with a higher incidence of subsequent malignant disease (P less than 0.05), the risk being at least nine times greater in these patients. The predictive value of high levels of SP1 was 35%, the specificity 45.8% and sensitivity 100%.

Adult↗